1 files changed, 1 insertions, 1 deletions
diff --git a/src/deferred.js b/src/deferred.js
index f0b1f96e6..e525fc068 100644
--- a/src/deferred.js
+++ b/src/deferred.js
@@ -44,7 +44,7 @@ jQuery.extend({
 				// Get a promise for this deferred
 				// If obj is provided, the promise aspect is added to the object
 				promise: function( obj ) {
-					return typeof obj === "object" ? jQuery.extend( obj, promise ) : promise;
+					return obj != null ? jQuery.extend( obj, promise ) : promise;
 				}
 			},
 			deferred = {};